Buffing mechanism



Sept. 252 1928.

J. F. OCONNOR BUFFING MEcHANlsM jig Patented Sept. 25, 1928.

JOHN F. OtCONNORi, OF CHICAGO, LLLINOISQASSIGNB TG insane nr; carica;

Minna, INC., vor

CHICAGO, ILLNOIS, A CORPQRTION DELAWARE.

BUFFING MECHANISM.

This invention relates to bulling mecha.- nisms.

An lobject of the invention is to provide a batting mechanism includinga. main spring,n resistance, and a friction system, and wherein a hollowintegral housing is utilized which substantially encloses all of theoperative parts of the mechanism, and wherein the friction system -isbodily movable for setting up a preliminary spring action vto taire careof i'elatively lightshocks, and operates aft-er predetermined ,movementbined frictional and spring' resistanceto talre up heavier shocks, theintegral walls of the housing beingutilized as guides for the movablefriction system which guides are soarranged asto maintain parts ofthefriction system in assembled relation with the housing. c

A more particular object of the invention is to provide a buflingmechanism including` anv elongated hollow housingvr having a.frictionshell mounted `for longitudinal movement therein, inconJunction-with removable lmembers associated vwith the shell whichserve as combined guides and stops for the shell, and in which linersare provided for the shell, havingmeans by which they are secured to theshell, said means serving also to lock the removable members inoperative position. l l

Other and further objects of the invention will more clearly and fullyappear from the description and claims hereinafter following.V

In'the drawings, forming part of this speciiication, lligure l isalongitudinal vertical sectional view of afragment of an end plat'- formof a railway car showing the invention in connection therewith. Figure 2is a hori- Zontal sectional view taken centrally through the butilngmechanism.A Figure 3 is averticalv sectional view of the inventioncorresponding` substantially to linel 3h?) of Figure 2. Fie'- ure 4 isan end elevational view of the butting mechanism. And Figure 5 is atransverse sectional view of the invention corresponding substantiallyto the line 5 5 of Figure 2.

As shown in they drawings, 10 represents the end platform of a railwaycar provided with the usual poclret ll in which the'bufting mechanismindicated as a `whole by the numeral l2, is disposed, said mechanismbeing` supported by a web lextending across the bottom of the pocket.4The usual center stem is indicated at le, and the butler headat toprovide com- Application. filed. April 22, 1327. Serial No. 185,883.

l5, the latter being carried on the usual side stems not shown. 1

ylhe buliing mechanism 12 comprises, broadly speaking, a housing A; amain spring resistance B; 'a friction shell C.; friction shoes D; and awedge E.. f

The liousingfA preferably comprises integrally formed top and bottomwalls loe-16,

sidewalls 17V-17, and rear end wall-18, the front end of thehousingbeingv open. The top and bottom walls a cent-rally disposed rib19, extending from a pointslightly forwardly of the center of thehousing', rearwardly, each rib being` provided with a round bore 2Ocommunicating at its rear end with a socket 21 which, opens; outwardlythrough the rear wall lS'of the hous- 1 ing, said bore and .socketybeing adapted vfor are each provided with l the reception of one oftheretaining reds used inconneetion 'with` the mechanisni. The top andbottom walls at their. front endsare cutout as indicated at 22--f22, forco-operation with part-s of the shell C. Y'lhe sidewalls lil-17, on theinner surfaces of their forward ends, are each providedwith a thickenedportion in Awhich is formed a groove23,

the groove` terminating somewhat inwardly from the front end of eachside wall in stop shoulders, yindicated by the reference character 24.lThe side walls lf-l? are further providedl with apertures 25-e25, oneof which communicates with each ofthe grooves 23 in the side walls.

Disposed within the housing A is a main spring resistance B whichVcoi'nprises `apairV of heavy coiled springs arranged at. oppositeVsides of the ribs 19, each of saidsprings having a smaller spring ofVthe character-indicated at 26. disposed onthe vinterior thereof,

all of the springs ,bearinfr upon the end wall 18, while the ,forwardrend portions of the springs bear upon a follower 27. The fol-- lower 27is provided on its forward face with an annular' rib 28, said rib beingdisposed about a boss 29, the parts 28 land 29' being provided for apurpose hereinafter described.

i The shell C comprisestop andl bottomrwalls S30-30 of a width to litthe cut-out portions 22-22in thev vtop and bottom walls .of the housingA, and with side wallsl Sli-3l, which are thickened tol provideHoif-sets552-32 which fit between the` top and bottom walls vof the housing,andthe outer-faces of ywhich are disposed in relative closeproximity tothe inner Vsurfacespof the' .Side walls 17%17 of said` 'Y housing. Theinner surfaces of the walls i posed a liner 33.

guide grooves 23, wherein the same is adapted le;l

to move longitudinally of the mechanism, Vforward movements of the samebeing limited by the shoulders 24 in the guides. Each of the liners 33is provided with a lug 36 which enters one of the slots 34 in the sidewalls of the shell, the lugs 36, when the parts of the mechanism are inoperative position, coming into contact with the adjacent end' of .oneof the locking elements ork blocks 35,

whereby the latter is detachably held in po'- sition by the lug 36, thevlatter also having the function of maintaining the lliner in positionwith reference jto the shell C. The

' sidewalls of the shells are provided with lon itudinally extendingholes indicated at 37 or the purposeoflesseningthe weight of the shell.Y

vThe outer face of each of the liners 33 is provided with a frictionsurface indicated at v38,7and cooperating With each of the liners is oneof the friction shoes D. The friction shoes are identically similarexcept for their opposite disposition, and each shoe includes africtionsurface 39 disposed in contact with the friction surface 38 of theadjacent liner, and on the sides of each of the shoes D o posite thefriction surface 39 is a wedge sur ace 4() adapted to co-operatewithwedge surfaces formed upon the wed e E. The portionsof the shoes Drearward y of the wedge surfaces 40 are cut out to provide shoulders 41upon which bears the forward end of an` Vauxiliary coiled spring 42, therear end of said s ring bearingupon the front face of the fo lower 27,andbeing disposed about the boss 29 on said follower. The rear ends ofthe friction shoes D are disposed inline with the annular rib 28 andcome into Contact during one phaseof operation of the mechanism.

The wedge D is provided with an abutting face 42 adapted to be engagedby the inner end of the center stem 14. The wedge D. is maintained inposition 4by means of the retainer Vbolts 43-443, the rear heads 44 ofwhich are disposed in the sockets 21 formed in the ribs of the housing,each of the bolts 43 extending through the bore in the rib,

through an aperture in the follower 27, and

. the ends of said bolts are provided with nuts 45 dis Sed in recesses46- 46 inthe wedge, wheregy the wedge is maintained in operativeassembledv relation withrespect to the mechanism.

In operation, assuming inward movement of the centerstem 14 under theinfluence of a relatively light shock transmit-ted thereto, themovement'of the stein'will be communicated to the wedge E. The wedge Ethrough the shoes D bearing upon the liners 33-33, which are connectedvwith the shell C, will move the shell C inwardly against the f ol lower27 which will compress the main spring resistance B the'required extent,the retain;- ing bolts 43 sliding rearwardly in the' housing, and: themovements of thefshell being guided by the removable membersv in theguide grooves 23-23. VUnder a light shock causing movement ofthefriction system a distance short of causing contact be'- tween'the shellC and the stops provided by the rear walls of the cut out yportions2222,= no relative movement of the shoesl and wedge' with respect to theshell will occur. and all' of the parts will resume their initialposition when the actuating force is removed from' the wedgeoutwardmovement of the shell C being limited by reason of contact o f the removable members 35-35 with:the stops" 2424, while the wedge E Will'b'elimit-ed in its forward movement by the heads v44--44 of the retainingbolts 43-43 cominginto contact with the oil-sets provided by the sockets21-21. Under a relatively heavier shock,

thewedge E, shoes D, and shell C, will travel` inwardly as beforedescribed, until the shell C comes into contact with the rear walls ofthe cut-out portions 22-22, which will ai"- iest rearward movement ofthe shell, and cause'rthe wedge to move the friction slices I) inwardlyagainst the follower 27, further compressing the main spring resistanceD and setting up combined frictional and resilient resistance.V Thevarious parts are returned to their initial position under the influenceof the main spring resistance B. The spring" 42 has the function ofmaintaining the shoes and wedge in proper position and compensatingforwear upon the friction surfaces.

Vhile I have herein shown and described what I consider the preferredmanner of carrying out the invention, the same is merely illustrative,and I contemplate all changes and modifications which come within vthescope of the claims appended hereto.

I Claim: i

1. In a butling mechanism of the character described, comprising anintegral housing open at one end; a main spring means arranged in saidhousing; a shell mounted in lli lil'

said housing and movable longitudinally'V with respect thereto;removable members cooperating with the walls of said housing to provideguide means forsaid yshell; awedge; friction shoes co-operating withsaid wedge;

liners for said shell having friction surfaces co-operating with saidfriction shoes;V and neeaivs provided with guide means having stopmembersassociated therevith; a friction system disposed within saidhousingv and movable longitudinali with res Dect thereto reiiiovs V l iable members associated with said friction system and cor-operating Withsaid guide and stop means, said removable members beine maintained inposition When the members of said friction system arel assembled; andmeans for maintaining the members ofsaid friction system in assembledcondition.

-In a bufling mechanism of the character described, comprising a housinghaving top,

bottom, side and end Walls, said housing .be e

ing open at one end, the top Walls of said housing being cut out fromthe front ends thereof rearwardly, and the side Walls of said housingbeing provided with guides; a shell longitudinally movable of saidhousing and limited in its rearward movement by said cnt-out portions;means associated with said shell co'- operating with said guide, toguide said shell and limit the forward movement thereof; a

iyedge and friction Velements co-operating With-said shell; meansanchored to the housing for limiting forwardmovement of said Wedge andfriction elements; and yieldable means arranged in said housing andco-operating with said shell and said Wedge and friction elements.

l. In a devicev of the characterdescribed,

the combination with a housing having top, bottomside andv end Walls,the top Walls of said housing being cut out for a limited distancerearwardly from the front ends thereof and said side ivalls beingprovided with combined guide-and stop means; a shell disposed l Withinsaid housing and longitudinally movable With. respect thereto, the sideWalls of said shell being provided with transversely extending slots;liners secured to the side Walls of the shell; removable membersarranged in said slots engaged by said liners and retained thereby andco-operating with said combined guide land stop means; a Wedgeaiidfriction elements (io-operating With said shell and adapted tomaintain; said liners andv .said removable Ymembersin operative relationwhen in assembledcondition; means for holding said Wedge and frictionelements assembled; and yieldable means co-operating with said shell andsaid Wedge and friction elements.

' 5. In a device of the characterdeseribed, the combination with ahousing; of'a shell disposed Within said housing and longitudinallylmovable with respect'thereto; means for limiting movement of said shellinwardly of said housing;'nieans forl limiting` move-4 ment of saidshell outwardly4 of saidhousing, said means including members removablycarried by said shell and engaging stopmeans on said h'ousing;,linersfor said shell, havingl projections Afor anchoring the saine to theshell, said projections engaging saidmembers; a Wedge and frictionelements co-operating With said shell and engaging said liners to holdthe same assembled With the shelland maintain said removable members inposition for cooperation With said stop means when assembled condition;and means for maintaining said Wedge and friction elements in assembledrelation With respect to said shell. A p t In Witness that I claim theforegoing I have l hereunto subscribed my name this 18th day of Api-ii,1927. Y

. .ions r.. oooNNon..

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